i18n(uk): add missing files, translate P4 root docs

- Copy code/image/config files across all modules
- Translate brand-voice and code-review templates
- Translate CONTRIBUTING, CODE_OF_CONDUCT, SECURITY, STYLE_GUIDE
- Copy CHANGELOG as-is (technical log)

Ref: luongnv89/claude-howto#63

uk/07-plugins/documentation/README.md

@@ -0,0 +1,119 @@
+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="../../resources/logos/claude-howto-logo-dark.svg">
+  <img alt="Claude How To" src="../../resources/logos/claude-howto-logo.svg">
+</picture>
+
+# Documentation Plugin
+
+Comprehensive documentation generation and maintenance for your project.
+
+## Features
+
+✅ API documentation generation
+✅ README creation and updates
+✅ Documentation synchronization
+✅ Code comment improvements
+✅ Example generation
+
+## Installation
+
+```bash
+/plugin install documentation
+```
+
+## What's Included
+
+### Slash Commands
+- `/generate-api-docs` - Generate API documentation
+- `/generate-readme` - Create or update README
+- `/sync-docs` - Sync docs with code changes
+- `/validate-docs` - Validate documentation
+
+### Subagents
+- `api-documenter` - API documentation specialist
+- `code-commentator` - Code comment improvements
+- `example-generator` - Code example creation
+
+### Templates
+- `api-endpoint.md` - API endpoint documentation template
+- `function-docs.md` - Function documentation template
+- `adr-template.md` - Architecture Decision Record template
+
+### MCP Servers
+- GitHub integration for documentation syncing
+
+## Usage
+
+### Generate API Documentation
+```
+/generate-api-docs
+```
+
+### Create README
+```
+/generate-readme
+```
+
+### Sync Documentation
+```
+/sync-docs
+```
+
+### Validate Documentation
+```
+/validate-docs
+```
+
+## Requirements
+
+- Claude Code 1.0+
+- GitHub access (optional)
+
+## Example Workflow
+
+```
+User: /generate-api-docs
+
+Claude:
+1. Scans all API endpoints in /src/api/
+2. Delegates to api-documenter subagent
+3. Extracts function signatures and JSDoc
+4. Organizes by module/endpoint
+5. Uses api-endpoint.md template
+6. Generates comprehensive markdown docs
+7. Includes curl, JavaScript, and Python examples
+
+Result:
+✅ API documentation generated
+📄 Files created:
+   - docs/api/users.md
+   - docs/api/auth.md
+   - docs/api/products.md
+📊 Coverage: 23/23 endpoints documented
+```
+
+## Templates Usage
+
+### API Endpoint Template
+Use for documenting REST API endpoints with full examples.
+
+### Function Documentation Template
+Use for documenting individual functions/methods.
+
+### ADR Template
+Use for documenting architectural decisions.
+
+## Configuration
+
+Set up GitHub token for documentation syncing:
+```bash
+export GITHUB_TOKEN="your_github_token"
+```
+
+## Best Practices
+
+- Keep documentation close to code
+- Update docs with code changes
+- Include practical examples
+- Validate regularly
+- Use templates for consistency